Here's a nice tutorial/video from Dave about this topic...
https://www.finewoodworking.com/2017/12/20/sketchup-details-transitioning-from-square-to-round

Very nice!

Here too...

And the hooks are just hooked up?

nice showroom (and chair of course)

applied to a sphere...

And if you don't see these options, you have to search for the "more options..." button.

QFT, VertexTools, JPP and TIG.splitdonut?

[Plugin] TIG.splitdonut

Split Tools?

A hint?

Protude, FredoScale and VertexTools?

Protude, QuadfaceTools, Vertex Tools and the one that wasn't necessary?

First guess:

• Protude or JPP
• SketchyFFD or FredoScale
• QuadFaceTools

I don't have an english version at the moment, but there is a setting in the view (?) menu about component editing for this.

You should use SketchUp MAKE 2017, the last dektop version of the free for personal use MAKE version.
(And welcome back, I remember you )

@sashagas said:

Hello!! Tell me why I can not install the plugin
BezierSpline 1.9a. It does not appear on the toolbar, although it is installed. I can not understand what's the matter, the side plugins work.[img][img][img][img][/img][/img][/img][/img]

LibFredo is installed too?

@scruff said:

Dave's is the only response that actually deals with the question

As you like, isn't one satisfying answer not enough?

Maybe you can try some file recovery softwares or repair the usb drive and be lucky that this repairs these files too?

A fast way would be the intersection with such a "grid" component...